Scraper



C. LE BLEU Dec. 15, 1942.

SCRAPER Filed Aprn 5, 1941 5 sheets-sheetA 1 C. LE BLEU Dec. 15, 1942.

SCRAl ER Filed April 5, 1941 5 Sheets-Sheet 2 llllm oi.

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Dec. 15, 1942. c. LE BLEU- SCRAPER Filed Apfil 5, 1941 5 sheets-sheet 5 I NV EN TOR.

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SCRAPER 5 Sheets-Sheet 4 Filed April 5, 1941 IN VEN TOR.

C. LE BLEU Dec. 15, 1942.

SCRAPER Filed Apri1 5, 1941 5 Sheets-Sheet 5 R. E w 1I Patented Dec. 15, 1942 UNITED STATES PATENT o FFlcE scimmia charles4 Le Bleu, Los Angeles, Calif.

Application April 5, 1941, Serial No. 387,023

v (ci. 37126 16 Claims.

This invention relates to improvements in material handling devices of the type commonly known as scrapers whichare used for excavating and transporting materials, the objects of the present invention including the provision of a relatively stationary bowl, a movable rear bowl mounted for telescoping movement in connection with said stationary bowl and initially forwardly movable to eject materialfrom said main bowl and thereafter tiltable to dump the load in said movable bowl, an auxiliary bowl arranged at the forward end of the main bowl to be loaded in conjunction therewith and operable to open and close the front end of the main bowl, and mechanisms for operating the movable and auxiliary bowls and for raising and lowering the main bowl.

Yet another object of my invention is the provision of a main bowl open at both ends, a movable bowl normally disposed in a retracted position extending rearwardly from said main bowl,'

bowl when in said advanced position.v

Another object of my invention is the Vprovision in a scraper, a rear bowl, an auxiliary bowl arranged forwardly of said rear bowl and confronting the same, both bowls being operable to discharge materials at theirY confronting ends, and control means for said bowls adapted when actuated to cause said bowls to operate concurrently to discharge materials only after predetermined initial movement of said auxiliary bowl.

More particularly, it is an object of my invention'to provide, in a scraper of the character described, control means for amovable and an auxiliary bowl initially operable when actuated to move the auxiliary bowl from a closed to an intermediate position exclusive of said movable bowl and thereafter operable upon continued actuation of said control means to moveboth bowlsy concurrently in a direction discharging the load from a relatively stationary main bowl and said auxiliary bowl directly onto the ground at their adjacent ends, said control means being thereafter operable to cause said movable bowl to discharge. l

Still another object of my invention is the provision in a scraper, a bowl, an auxiliary bowl, both bowls being adapted to discharge materials directly onto the ground, a common operating cable applied to said 4bowls to cause the discharging of same, and other operating means applied to both bowls and cooperating with said common operating cable, said common operating cable being initially operable to move said auxiliary bowl from a closed to an intermediate position exclusive of said bowl and thereafter operable in conjunction with said other operating means to move both bowls concurrentlyin a direction discharging materials. For a broader view of this type of bowl control reference is made to applicants prior co-pending application Serial No. 378,047, led February 8, 1941, and upon which the present invention is an improvement.

A further object of this invention is the provision of a spring actuated retracting means for the movable bowl.

And yet another object is the provision of meansfor raising and lowering the scraperso as to selectively dispose the same in a loading or in a load transporting position.

Still other objects and advantages of my inventionfshould be apparent to those skilled in the art upon a detailed perusal of the following specifications and the accompanying drawings, and it is to be understood that my invention is susceptible to numerous modifications in the combination, correlation and construction of parts, members and features and may have wide application in the design, construction and use of Scrapers without departing from the spirit of the invention as defined in the annexed claims;

AIn the drawings: n

Figure 1 is a side elevation of my invention with all parts disposed in a load transporting or carrying position, the spring housing being shown partly in section.

Figure 2 is a side elevation in section taken on broken line 2--2 of Figure 5 and shows the scraper disposed in loading position, the initial loading positions of the rear movable and aux-Y iliary bowls being indicated in broken lines,

Figure 3 is a side elevation in section taken on line 2-2 of Figure 5, and shows the rear movable bowl in its advanced position inthe relatively stationary main bowl, the auxiliary boWl being shown in dumping position.

Figure 4 is a side elevation in section, also taken on broken line 2-2 of Figure 5, and shows therear movable bowl in its advanced tilted position for discharging the load therefrom.

Figure 5 is a fragmentary top plan view of my scraper, all parts being in carrying position. Figure 6 is a side elevation of the movable bowl detached from the scraper.

Figure 7 is a side elevation in section of the movable bowl detached from the scraper.

Figure 8 is a fragmentary top plan view of one its forward edge with a transversely extending scraper blade I3 detachably secured thereto.

Each of the sidewalls II is rigidly secured to an adjacent frame beam I4 which overhangs sidewalls II in both a forwardly and a rearwardly direction, the forward ends of said beams I4 being rigidly secured toa transversely extending beam I5. The overhanging rear ends of frame beams VI4 are supported on atransversely extending axle I6 provided with rolling supports I1. A reinforcing beam I8 extends with each of the sidewalls II and is rigid therewith, the forward ends of beams I8 terminating with side walls II, the rear ends thereof being rigidly secured to frame beams I4, as shown, said beams I8 being rigidly Aconnected by means of a transversely extending beam 90.

` Thus, main bowl I together with beams I4, I5, I8 and I9 constitute a rigid frame and bowl structure supported for vertical tilting movement about rear wheels I1 as an axis.

A draft and controlframe 23 comprises a pair of spaced apart arms 2l extending along opposite sides of the rigid frame and bowl structure to a rigid connection at their forward ends with a transverse frame structure 22 provided on its forward side with a downwardly extending arm 23 articulately supported at its lower end, as shown, on a pony truck 24 which vis provided with a draft tongue 25 adapted at its 'forward end for connection to a draft device the rear ends of arms 2l being pivotally connected at 26 to said rigid frame and bowl structure some distance above bottom I2 and adjacent the rear end thereof.

` Transverse frame 22 is provided with brackets 21 overhanging the same in a vrearwardly direction and provided with a pin 2'8 upon which sheaves 29 are journaled.

Beam I is provided withbrackets'3'9 carrying pin 3l upon which sheaves 32 are journaled, sheaves 32 being arranged relative to sheaves 29.

A cable '33 is anchored in any suitable conventional` manner and is then reaved back and forth about sheaves 32 and 29 and may extend thence to a winding drum, (not shown`because of `conventional design).

It will be readily understood that cable 33 may be pulled or'slackene'd'to tilt the rigid frame and bowl structure upwardly or downwardly respectively at its forward end about re'ar wheels `I1 as an axis.

A movable or telescoping rear bowl 34 is arranged between side walls II and comprises an integral bottom and rear wall indicated at '35 and 36 respectively, provided at each end thereof with a sidewall 31 which is rigid therewith and extends upwardly beyond beams I8, said upper extensions of sidewalls 31 being formed as an overhanging inverted U bracket each of which straddles a channel rail 38 carried by the rigid frame and relatively 'stationary `bowl "structure,

the overhanging and downwardly extending portions 39 of these U brackets each being provided with laterally projecting trunnions 46 and 4I which project inwardly of channel rails 38, each of the trunnions 40 and 4I having a wheel 42 journaled thereon to roll within channel rails 38. The upwardly extending and overhanging portions of sidewalls 31 are each reinforced by a beam 43, see Figures 5, 7 and 8, which is rigid therewith and also with `a transverse `beam 44 which extends along the upper edge `offback wall 36 to which it is rigidly attached.

1 Thus it is seen that a movable bowl 34 is :mounted for movement lengthwise of and in the relatively stationary main bowl I9 from a rear or retracted position in which the movable bowl overhangs the rear end of the main bowl, constituting in effect an extension thereof, to an advanced or forward position in which the front edge of said movable bowl is disposed at substantially the forward edge of the main bowl, the forward edges 'of bottom wall'35 and sidewalls 31 being Varranged and adapted to cooperate with sidewalls Il and bottom wall I2-of the main bowl.

The advanced position of movable bowl 34'is defined by stops 45 which lare `shown as being rigid with sidewalls II of the main bowl, and it is provided that movable bowl 34 is tiltable 'about its forward edge as an axis, when Vin Vsaid advanced position, to `dump materials therefrom. Therefore, channel rails 38 include a horizontal portion 46 which extends parallel to bottom wall I2 of the main bowl, and an arcuate portion 4'1 which extends as a segment of a circle the focal point vof which is the axis about which movable bowl 34 tilts when in `advanced position. Thus, the frontwheels l42 of the movable bowl travel the arcuate portion 41 of rails 38 as saidbowl tilts, and therear'wheels 42 of movable bowl 34 escape cooperative confinement in channel rails 38 through slots 48, provided in the upper leg of veach of the channel rails 38, as bowl 34 tilts forwardly to dump materials.

An inverted A frame structure 52 projects upwardly from the scraper at the forward end 'of main bowl I0 and comprises a pair of legs 49 each of which is 'rigid at the lower end thereof with an adjacent sidewall II, said legs 49 converging toward their upper ends `to la rigid connection Ywith a short horizontal beam '50.

A hollow beam 5I is `arranged above the scraper and is rigid at its forward end with the vA frame 52, said beam 5I being rigidly supported adjacent its rear end, as shown, on transverse bea-m I9.

A compression spring 53 is disposed within hollow beam 5I, the forward end thereof bearing against a fixed block 54.

The rear end of beam 5I supports therein a'plug 55 detachably secured in place by pin V56, said plug 55 `beingprovided with rearwardly extending laterally spaced arms 51 between which sheaves58 are disposed and journaled on a pin 59 carried by arms'51.

A block 6U lis slidably disposed in beam 5I, between plug 55 land the rear end of spiral spring 53. A cable 6I is anchored in sliding block 60 and passes in a forward direction through spiral spring 53 and fixed block 54, thence upwardly about a sheave 62 journaled on pin 63 carried by brackets 64 which are 'rigid with beam 50. Cable 6I extends thence rearwardly and is provided at its rear end with sheave block 65. A cable 66 is anchored about-pin 59 and is Athen reaved back and forth 'about Asheave'block 65 and sheaves `58 from which it extends to a guide sheave 61 journaled on' a. pin 68 carried by brackets 69 which are supported by beam I9. :From guide sheave 61 cable 66 vextends to a pivotal connection with a pin 16 carried by brackets 1I which are rigidly'at.- tached to movable bowl 34.

V.The spiral spring 53 is always under lcompression in both the advanced and retracted positions of movable bowl 34. As bowl 34 advances from a retracted position the pressure in spring 53 will build up as the same compresses, but the. extent of this build up is greatly minimized through the block and tackle applicationof cable 66 to cable 6I so that therequired compressive movement of spring 53 isv much less than the corresponding movement of bowl 34 which brings about said compression.

An auxiliary bowl 12 is arranged to swing at the forward end of main bowl I so as to cooperate therewith, vsaid auxiliary bowl being mounted on the rigid frame and bowl structure as follows; auxiliary ybowl 12 is providedA at each end thereof, inwardly of beams I4, with an upstanding arm 13. An arm 14 is arranged above each of the beams I4, each of said arms 14 being pivotally supported at their rear ends on the rigid frame and main bowl assembly as shown at 15.- vThe forward ends of arms 'I4 and the upper ends of arms 13 are rigidly connected by short horizontal beams 16 which extend crosswise of beams I4 above the same. Thus, the auxiliary bowl 12 is mounted to swing about pivots 15 as an axis.

It is to ber noted that auxiliary bowl 12 includes, at each end thereof, a sidewall 11, and that the confronting edges of sidewalls 11 and II are each formed as a segment of a circle, the focal point of said circles being the axis 15 about which the auxiliary bowl swings.

It will be further noted that the bowl `12 is provided with stops 18 which are arranged to engage the lower ends of legs 49 so as to limit upward swinging movement of bowl 12.

`The means .by which movable bowl 34 and the auxiliary bowl 12 are controlled will now be described.

AAuxiliary bowl 12 is provided with a horizontal pin Y19 upon which sheaves 80 are journaled. Short horizontal beam U of the A frame 52 is provided with brackets 8| carrying a pin 82 upon which is journaled sheaves 83, and beam 44, which extends along the upper edge of back wall 36 of movable bowl 34, is provided with brackets 84carrying pin 85 upon which is journaled sheaves 86. A single cable 81 is anchored about pin 85 and passes thence back and forth about sheaves 83 and 86 so as to provide a block and tackle effect therebetween. Cable 81 then passes back and forth about certain other of the sheaves 83 and the sheaves 80 carried by the auxiliary bowl 12. Cable 81 may extend thence to a cable winding drum, not shown because of conventional design.

Now obviously, a pulling force applied to cable 81 would be transmitted to both the bowls 34 and 12 simultaneously, but due to the retractive force applied to bowl 34 by spring 53 the auxiliary bowl 12 would swing upwardly until stops 18 engaged the lower ends of legs 49, which is the full discharge position of the auxiliary bowl, after which the movable bowl 34A would move forwardly. However, it is desirable to have movable bowl 34 begin its forward movement before auxiliary bowl 12 has reached a discharge position.

The reason for this lies in the fact that if the scraper is so constructed that the auxiliary bowl movestoits uppermostlimits of Atravel before the main bowl begins to discharge the load released by the auxiliary bowl will, in some conditions, have disappeared under the blade before the load in the main bowl begins to discharge leaving a gap or depression in the load as it is spread by the `advancing movement of the blade. Therefore I have provided other operating control means to cooperate with cable 81 so as to predetermine and limit relative movement between the bowls, and said other control means will now be described.

Each of the arms 14 comprises spaced apart parallel bars, see Figures 5 and 9, between which sheaves 88 and 89 are disposed, sheaves 88 being journaled on the trunnions indicated at 15, sheaves 89 .being journaled on pins 9U carried by arms 14 as shown. Brackets 9I are arranged below each of the arms 14 and are supported on beams I4, said brackets being provided with pins 92 upon each of which a sheave 93 is journaled. A pair of cables 94 are disposed along opposite sides of the scraper and pivotally connected at their rear ends to an adjacent projecting trunnion 40 and are connected at their forward ends to beam I4, the intermediate portions of cables 94 passing, in a forwardly direction, over sheaves 88, under sheaves 93 and over sheaves 89.

Referring to Figure 1, it will be seen that when bowl 34 is in retracted position and auxiliary bowl 12 is in closed position there is slack in cable 94 as shown at 95, so that when a pulling force is applied to cable 81 the auxiliary bowl will move upwardly, exclusive of bowl 34, until the slack is removed from cable 94, see Figure 2, after which both bowls move concurrently in a direction discharging materials. Thus, cables 94 may properly be viewed as a collapsible connection between the movable and auxiliary bowls to predetermine and limit relative separating or extendingmovement therebetween.

In the operation of the scraper the same is caused to move across the surface of the ground to scrape up a load therefrom, and to transport the load'to a place where the materials are then discharged.

Assuming the bowls to be loaded and in the carrying position shown in Figure 1, to discharge said load, a pulling force is applied to cable 81 with the results that auxiliary bowl 12 will move upwardly, exclusive of bowl 34, to the position, relative to main bowl I0, shown in Figure 2, in which position of the auxiliary bowl 'I2 sheaves 89 have moved to the upper limits of slack loops 95 in cable 94 thus removing the slack therefrom so that thereafter, as the pull on cable 81 is continued, both bowls move concurrently to the positions shown in Figure 3, vin which position the auxiliary bowl 12 is in a posi-tion to discharge material while movable bowl 34 has moved to the ladvanced position ej ecting the load in main bowl Ill. Now, being in the position shown in Figure 3, if the pull on cable 81 is continued, movable bowl 34, having engaged stops 45, will be caused to tilt forwardly about its lower forward edge as an axis to the position, shown in Figure 4, dumping the load therefrom.

Having discharged the load, cable 81may be allowed to run slack and due to the retractive effort of spring 53 on bowl 34, bowl 34 will tilt downwardly at its rear end, exclusive of the auxiliary bowl 12, to again assume the position of Figure 3. Cable 81y may then be arrested and held stationary to maintain the bowls in the positions Ishown in Figure 3, in which positions of the bowls-the scraper may be drawn to the place where a'load is to be gathered. Cable 33 is then allowed-to run slack to bringbladeflfv intoscraping lengagement with the ground. `As the scraper advances dirt .moves across the blade `irrtdmovable bowl A34 and fwhen the same fhas .become loaded cable :Bl is allowed to-run slack so that bowl 34 `is caused vtomove` rearwardly to .the retracted position inresponse to pressure in spring 53, while, concurrently therewith, auxiliarybowl 'l2 moves downwardly, both bowls then beingin the position shown in Figure2, and .as the .advance continues dirtmoves over the blade into the mainfbowl l-@Yuntil the same isloadedafter which dirt moves upwardly against the load in the main bowl-and falls forwardly into `the auX- iliary bowl 'l2 to vload the same. "Cable-8l isthen allowed to run slack so Vas to allow'the auxiliary bowl to move downwardly-and come to rest closing the-forward end of the main bowl.A Cable '33 is then pulled, raising the scraper tothe carrying position shown inf-Figure 1.

Again viewing Figures 1 and 2 especially, it should'be noted that auxiliary bowl 'l2 may properlybe viewed as having closed, loading or intermediate, and dumping positions, the closed position being shown in -Figure l, the load-ing position being shown in vfull llines in Figure 2 in which position the auxiliary bowl is disposed to receive and support a load which moves upwardly against the load in the main bowl and falls forwardly into the auxiliary bowl. The dumping position of the auxiliary bowl being shown in Figures 3 and 4 and also in broken lines in Figure 2.

Viewing Figures 2, 3 and 4 it will be seen that the movable bowl 34 may be viewed as having, a retracted position shownin Figure 2, an advanced position shown in Figure 3, and a tilted position shown in Figure 4.

Applicant's invention is a marked improvement upon telescoping scrapers of prior design in which the rear movable bowl is not provided with an integral bottom and rear wall, as in applicants invention, but instead the rear bowl .is open at both ends and provided with a forwardly movable endgate for ejecting the load in the movable bowl, which arrangement requires means mounting the rear bowl for forward movement in the main bowl and also means mounting the endgate for advancing movement into the rear bowl. This is a duplication of mounting means when compared with applicants rear movable bowl having integral bottom and rear walls. Thus applicants invention has fewer moving parts and is simpler to make.

From the foregoing description it will be seen that 1 have provided a scraper that substantially fulfills the objects of the invention as set forth.

Having thus described my invention, what I claim as new and usefuland desire to secure by Letters Patent is:

1. In a scraper, a relatively stationary main bowl open at both its forward and rear ends, a movable bowl normally disposed in a retracted position projecting rearwardly from said main bowl, means supporting said movable bowl for movement from said retracted position to an advanced position in said main bowl and for tilting movement relative to said main bowl when in said advanced position, and control means to first advance said movable bowl and thentilt the same while in said advanced position.

2. 1n a scraper, a relatively stationary main bowl open at both its forward and rear ends, a movable bowl including bottom and rear walls and normally disposed in a retracted position .projecting .rearwardly from ,said main bowl,

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means supporting said movable bowl ifor `movement to `,an :advanced positioncin saidV main i'bowl and thereafter :movable while `-insaid advanced position .to 4discharge alload from said movable bowlnanauxiliary bowl arranged in frontof ,said main bowl to be loaded inoonjunctiontherewith and. 'operable `to discharge ,materiaL control means for .said movable .and auxiliary ,bowls to cause .the `.discharging of .said bowls, and A`still other operating meansinterconnecting said movableand auxiliarybowls so as to cause said bowls to Yoperateconcurrently only after initial movement of said auxiliary bowl.

3. Ina scraper, va relatively stationary main bowl open at .both its forward and rear ends and including ya bottom wall,l a movable bowl including an integral bottom and rear wall and normally disposed .in a retracted ,position projecting rearwardly-from said main bowl, means supportingsaidmovablebowl `for movement parallel to said lmain bottom `from said yretracted position to an yadvancedposition in said mainbowl `and for tilting movementrelative to said main bowl when in said .advanced position, control means to first advance said vmovable vbowl and then tilt the same while in said advancedposition, and resilient means applied to said movable bowl Iand operable toreturn the-same to `said retracted posi.- tion.

4. In1a scraper, a `relatively stationary main bowl 4openat both its front and rear ends, a movable bowl normally disposed ina `retracted position projecting rearwardly from saidfmain bowl, -means supporting said4 movable bowl rfor movement from said retracted position to an advanced position in said main bowland for tilting movementrrelative to said main bowlwhen in said advanced position, .and control'means to first advance said movable bowl and then tilt `the vsame while in said advanced position, and `other :means applied to said movable bowl for returning the same tol-said retracted position.

'5.' In a'scraper, a relatively stationary main bowl ppen at both its forward and rear` ends,-a movable bowl including an integral bottom and rear wall and rnormally 'disposed in a retracted position projecting rearwardly from said `main bowl, means supporting said movable bowl for movement `from said retracted position forwardly to-an advanced position in said main lbowliand for tilting movement relative to said main bowl when in said advanced position, and control means to "first advance said movable bowl and then tilt the same.

6. In ascraper, a relatively stationary main -bowl open-at both --its -forward and kvrear ends and including a bottom wall, a movable bowl including an integral bottom and rear wall and normally-disposed in a retracted position projecting rearwardly from said main bowl, means supportling said movable bowl for movement parallel to `saidV main bottom from said yretracted position to Yan advanced position insaid main bowl and for forward vertical tilting movement relative to said main bowl when in said advanced position, control means to first advance said movable bowl and then forwardly tilt the same, and other means for returning said movable bowl to said retracted position.

7. In a scraper, a main bowl open at both its forward and rear.ends,.a movable bowl normally disposed A'in yaretracted position extending rearwardly Y from 4said main bowl, lrneans supporting said' movable 4bowl forumovement from Vsaid .re-

tracted position` to an advanced position insaid main bowl to eject a loadfrom said main bowl and thereafter movable while in said advanced position to discharge a load from said movable bowl, an auxiliary bowl arranged in front of said main bowl to be loaded in conjunction therewith and operable to discharge materials, and control means applied to said movable bowl and said auxiliary bowl to control the discharging of said bowls, said control means comprising in combination means interconnecting said bowls to limit relative separating movement therebetween and operating means for said bowls, said control means being adapted to function when actuated to move said auxiliary bowl from a closed to an intermediate position exclusive of said movable bowl and thereafter operable to move both bowls concurrently in a direction discharging materials.

8. In a scraper, a relatively stationary main bowl open at both its forward and rear ends, a movable bowl normally disposed in a retracted position projecting 'rearwardly from said main bowl, means supporting said movable bowl for movement from said retracted position to/an advanced position in said main bowl to eject the load in said main bowl and for tilting movement relative to said main bowl when in said advanced position to dump the load in said movable bowl, an auxiliary bowl arranged in front `of said main bowl to be loaded in conjunction therewith and adapted to discharge materials, and control means applied to said movable bowl and said auxiliary bowl to control the discharging of said bowls, said control means comprising in combination means interconnecting said bowls to limit relative separating movement therebetween and operating means for said bowls, said control means being adapted to function when actuated to move said auxiliary bowl from a closed to an intermediate position exclusive of said movable bowl and thereafter operable to move both bowls concurrently in a direction discharging materials.

9. In a scraper, a relatively stationary main bowl open at both its forward and rear ends; a movable bowl normally disposed in a retracted position projecting rearwardly from said main bowl; means supporting said movable bowl for movement from said retractedposition to an advanced position in said main bowl and for tilting movement relative to said main bowl when in said advanced position; an auxiliary bowl arranged in front of said main bowl to cooperate therewith and adapted to be disposed in a closed f position closing the front end of said main bowl or in an intermediate position or inadumping position; control means for said auxiliary bowl and said movable bowl comprising in combination means interconnecting said bowls to limit and predetermine relative separating movement therebetween and a common operating means applied to both bowls, said control means being adapted to function when actuated to move said auxiliary bowl from closed to said intermediate position exclusive of said movable bowl and thereafter operable to move both bowls concurrently in a direction discharging materials.

10. In a scraper; a relatively stationary main bowl open at both its forward and rear ends; a movable bowl normally disposed in a retracted position projecting rearwardly from said main bowl; means supporting said movable bowl for movement from said retracted position to an advanced position in said main bowl and for tilting movement relative to said main bowlwhen in said advanced position; an auxiliary bowl arranged in front of said main bowl to cooperate therewith and adapted to be disposed in closed position closing the front end of said main bowl or in an intermediate position or a dumping position; control means for said auxiliary bowl and said movable bowl comprising in combination .means interconnecting said bowls to limit relative separating movement therebetween and a common operating means applied to both said bowls, said control means being adapted to function when actuated to move said auxiliary bowl from closed to said intermediate position exclusive of said movable bowl and thereafter operable to move both bowls concurrently in a direction discharging materials, said movable bowl moving from kretracted to advanced position to eject the load in said main bowl as said auxiliary bowl moves from intermediate to dumping position, said control means being then operable upon continued actuation thereof to tilt said movable bowl while in said advanced position to dump materials therefrom.

11. In a scraperya relatively stationary main bowl open at both its forward and rear ends; a

Amovable bowl normally disposed in a retracted position projected rearwardly from said main bowl; means supporting said movable bowl for movement from said retracted position to an advanced position in said main bowl and for tilting movement relative to said main bowl when in said advanced position; an auxiliary bowl arranged in front of said main bowl to cooperate therewith and adapted to be disposed in closed position closing the front end of said main bowl or in an intermediate position or a dumping position; control means for said movable bowl and said auxiliary bowl comprising in combination collapsible means interconnecting said bowls to limit relative separating movement therebetween and a common operating means applied directly to both said bowls, said control means being adapted to functionwhen actuated to move said auxiliary bowl from closed to said intermediate position exclusive of said movable bowl and thereafter operable to move both bowls concurrently in a direction discharging materials, said movable bowl moving from retracted to advanced position to eject the load in said main bowl as said auxiliary bowl moves from intermediate to dumping position, said control means being then operable upon continued actuation thereof to tilt said movable bowl while in said advanced position to dump materials therefrom.

12. In a scraper, a relatively stationary main bowl open at both its forward and rear ends; a movable bowl including an integral bottom and rear wall and normally disposed in a retracted position projecting rearwardly from said main bowl; means supporting said movable bowl for movement from said retracted position to an advanced position in said main bowl and for tilting movement relative to said main bowl when in said advanced position; an auxiliary bowl arranged in front of said main bowl to cooperate therewith and adapted to be disposed in closed position closing the front end of said main bowl or in an intermediate position or in a dumping position; control means for said movable bowl and said auxiliary bowl comprising in combination means interconnecting said bowls to limit relative separating movement therebetween and a common operating means applied to both said bowls, said control means being adapted to function when actuated to move said auxiliary bowl from closed to intermediateposition exclusive of said movable bowl and thereafter opera; ble to move both bowls concurrently in,v a direction discharging materials, said movable bowl moving from retracted to advanced position to eject the load in said main bowl as said auxiliary bowl moves from intermediate to dumping position, said control means being then operable upon continued actuation thereof to tilt said movable bowl while in said advanced position to dump. materials therefrom.

13. In a scraper, a rear bowl, an 'auxiliary bowl arranged forwardly of' said rear bowl and confronting the same, both bowls being operable to discharge materials at their confronting ends. operating means applied to both said bowls to cause the discharging of same, and still other operating means interconnecting said bowls so as to cause said bowls to operate concurrentlyl lapsible means interconnecting said bowls to limit relative separatingk movement therebetween so as to causesaid bowls to operate concurrently only after initial' movement of said auxiliary bowl.

15. In a scraper, a rear bowl, an auxiliary bowl arranged forwardly of said rear bowl and confronting the sameV both bowls being operable to discharge materials at their confronting ends, a single pull cable applied to both said bowls and operable when said cable is pulled. to cause the discharging of same, and other cable means interconnecting said bowls to limit relative separating movement therebetween so as to cause said bowls to operate concurrently only after initial movement of said auxiliary bowl.

16. In a scraper, a main bowl open at both its forward and rear ends, a movable bowl normally disposedin a retracted. position extendingv rearwardly from said main bowl, means supporting said. movable bowl. for movement from said'v retracted position to an advanced position in said main bowl to eject' a load from said main bowl and for forward vertical tilting movement relative to said mainbowl while in said advanced position to'dump a load from said movable bowl, and control means to first advance said movable bowl and then tilt thel same.

CHARLES LE BLEU. 

